The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 1984
Filed:
Apr. 22, 1983
Applicant:
Inventor:
James B Hunter, Newton Square, PA (US);
Assignee:
Johnson Matthey, Inc., Malvern, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219543 ; 29 9 / ; 29620 ; 204 36 ; 338309 ; 338314 ; 219375 ; 219537 ;
Abstract
A heat generating element particularly well suited for use in an electrical space heater and method of making same include an electrically nonconductive substrate on which is coated a layer of an electrically nonconductive ceramic material having finely divided, micron size metallic particles dispersed therein. A path of electrical conductivity is established in the otherwise nonconductive ceramic material by burnishing the surface of the ceramic material between two separated points. Thus, as electrical current flows along the burnished path, heat will be generated due to the electrical resistance thereof.